USER`S GUIDE High Speed DC Circuit Breaker TYPE ... - Biziz

2.4 Operation
3. Inspection and Maintenance
Maximum operating voltage and current ratings are
as shown on the breaker nameplate.
During continuous operation, it must be loaded with
its rated operating current at maximum. Load currents
in excess of breaker nameplate rating are allowable
for brief periods. Refer to the short time currents
listed in Table 1a/1b. Do not exceed the rated
operating voltage shown on the breaker nameplate.
The drive and auxiliary trips function within the
specified control voltage range. The auxiliary trips
must be loaded with the values listed in Table 2a at
maximum.
Prior to carrying out maintenance, inspection or
checks on the circuit breaker, the breaker must
be open, the connections on both sides must be
grounded, the circuit breaker must be switched
off and the control plugs removed.
Non-compliance with these warnings can result
in death, severe physical damage and extensive
damage to equipment.
Metric tools are needed for all screws.
3.1 General
Regular inspection and maintenance must be carried
out to ensure the proper functioning of the
breaker and in order to achieve a long working life.
The intervals at which inspections must be carried
out may be determined by evaluating the breaker’s
duty cycle. Table 3a provides an overview of checks
to be carried out and lists the appropriate inspection
intervals. Table 3b provides indicators for maintenance
work. In order to check the latch mechanism,
the breaker can be opened and closed with a hand
lever. Fig. 2 shows the correct use of the lever.
Fig.1 Setting the overload release
Fig. 2 Manual ON/OFF.
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